Purifying water



(No Model.)

' W. T WEEDDALE.

PURIFYING WATER..l

No. 295,890; Payant-ed Mar. 25,- 1884.

To a/ZZ whom it may concern:

UNITED STATES 'PATENT @Priono WILLIAM TWEEDDALE, OF TOPEKA, KANSAS.,`

PURIFYING WATER.

SPECIFICATION forming partofLetters Patent No. 295,890, dated March 25, 1884.

Application led July 31, 1883.

Be it known that I, WILLIAM TWEEDDALE, a citizen of the United States, "residingat the city of Topeka, in the county of Shawnee and State of Kansas, have invented certain new and useful Improvements in Purifying Water for use in Boilers, as well as in the Apparatus Employed in the said Process; and I do hereby declare that the following is a full, clear,

and exact description of the invention, which will enable `others skilled in the art to which it appertains to make and use the same.

Figure 1 is an elevation, and Fig. 2 a plan, of theapparatus employed in my process.

Similar letters refer to similar parts in the two views.

Ais a tank, `of any desired proportions and content, divided into three compartments, ct all! ll/I B is an agitator, which consists of a steam and air pipe for introducing steam and air through its branches bb b, provided with stop-cocksinto the several compartments a a a. The steam` and air are distributed throughout the compartments by means of the perforated terminal sub branches a" rv m, which are'closed at their free ends. a

C is a dischargepipe, provided with a stopcock, through which the water from a is pumped into a ora at pleasure.

C and C are discharge-pipes, provided with stop-cocks, through which the purified Water is passed by Way of the main pipe D from ctf and aminto the boiler for use.

E is a Waste-pipe, through which, by means of its branches `e ef e, provided with stopcocks, the water with all its precipitates may be withdrawn from the compartments a Maf. F F F arefloating filters, through which the Water must pass before entering the discharge-pipe C C 0. 'A

G is a heater, divided into two compartments by the perforated diaphragmy.

H is a water-pipe, through which, by means of its branches h h, provided with stop-cocks,

p the water to be treated ,is passed into compartmenta or into the heater G.

(No model.) V

the cylinder or boiler into the heater, and L `is an exhaust-pipe for passing the steam from the heater into the open air.

Vhen the apparatus is arranged for Work as now described, compartment a is to be lled full or to a given gage with the water to be treated `through the branch pipe h. To this 'is to be added a quantity of the milk of lime somewhat in excess of that required to make a saturatedsolution of lime-water at the ordinary temperature-say This milk of lime must now be thoroughly mixed with the water by means of the agitator B, and then allowed about a half or three-quarters of an hour for precipitation. Then, by means of the jet-pump, transfer from the surface of this standard lime-water an approximately sufficient quantity into either one of compartments a and ct to treat a given quantity of the Water to be purified, as determined by a previous analysis. Then mix this standard limewater thoroughly with the water of the compartment by means of the` branch b" or b of the agitator. The Water to be treated must always be heated by passing through the steam of the heater G before it is introduced into the compartments a or a. After agitation, the condition of the Water should be tested with its proper reagent and corrected, as required, and then, when allowed to stand quiet for about an hour for precipitation, it is purified of its carbonatesand ready for use", but should 'sulphates appear in the Water after the carbonates are removed, add carbonate of soda lin solution, in quantity approximating the proportion required, as determined by previous analysis, to treat the quantity of water in the compartment. Then mix thoroughly with the agitator and test with a proper reagent, and correct as required; and now, after about an hour allowed for precipitation, the water is purified of its sulphates, and is ready for the boiler. The water must always be introduced into compartment a or of at a temperature so high as will leave it for ,this stage of the process atleast at as this degree of temperature is essential for the success of the process for the removal of the sulphates,

IOO

while it promptly accelerates the process for the removal of the carbonates, and thus effectually disposes of the necessity for the employment of large tanks.

I claim, and desire to secure by Letters Pat- {'oversaturated solution of lime-Water, which,

ent, as my inventionl after precipitation, is inducted into the Water '15 1. rIhe combination ofthe tankA and its to be treated, which, having already been compartments a a a with the agitator B, highly heatedfis thoroughly agitated and al` 5 the discharge-pipes C and D, the Waste-pipe lowed more or less time to settle, when car- E, the floating filters F F F, and heater bonate of soda is added, the Water being kept G, all constructed, arranged, and operated highly heated and the mixture again agitated 2o substantially as and for the purpose hereinand allowed to settle, substantially as hereinbefore described. before described. 1o 2. The process of eliminating oarbonates and yWM. TVVEEDDALE.

sulph ates from Water, consisting in introdu cin g Witnesses:

into and thoroughly mixing with a quantity GEO. D. HALE, of Water sufficient milk of lime to make an CHARLES E. TWEEDDALE. 

